Only a few types of trees have spherical, prickly seed pods, so here's how to identify each specific tree with spiky balls. Reviewed by Sylvia Duax Reviewed by Sylvia Duax You don't have to be a ...

After identifying the volatile compounds emitted by ripe ... “we are the first . . . [to examine] this topic.” He suspects that other trees with short-lived seeds may use odors to attract animals, he ...